U.S. patent application number 14/371486 was filed with the patent office on 2014-11-27 for seal strip and method and device for sewing same.
The applicant listed for this patent is PANAN COUNTY KELI SEAL CO., LTD.. Invention is credited to Yizhi Zhou.
Application Number | 20140345200 14/371486 |
Document ID | / |
Family ID | 48781052 |
Filed Date | 2014-11-27 |
United States Patent
Application |
20140345200 |
Kind Code |
A1 |
Zhou; Yizhi |
November 27, 2014 |
SEAL STRIP AND METHOD AND DEVICE FOR SEWING SAME
Abstract
Disclosed is a seal strip, comprising a tubular seal strip body
with a first end (116) and a second end (117), wherein the first
end (116) extends into the second end (117) and is securely
connected to the second end (117) by a sewing thread (113). Further
disclosed are a method and a device for sewing the seal strip,
wherein the sewing device comprises a seal strip feeding machine
(1), a device (2) for positioning the ends of the seal strip, a
device for inwardly folding an edge of the seal strip, a device (3)
for butt-joining the ends of the seal strip, a device (5) for
threading a needle for the seal strip, and a device (4) for sewing
the seal strip. The two ends of the seal strip are securely
connected by the sewing thread, providing a high connection
strength; and the method and device for sewing the seal strip can
accomplish complete automation in sewing the seal strip, thus
greatly improving efficiency during the production and processing
of the seal strip.
Inventors: |
Zhou; Yizhi; (Jinhua,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
PANAN COUNTY KELI SEAL CO., LTD. |
JINHUA, ZHEJIANG PROVINCE |
|
CN |
|
|
Family ID: |
48781052 |
Appl. No.: |
14/371486 |
Filed: |
December 7, 2012 |
PCT Filed: |
December 7, 2012 |
PCT NO: |
PCT/CN2012/086180 |
371 Date: |
July 10, 2014 |
Current U.S.
Class: |
49/498.1 ; 112/2;
112/475.08; 28/141 |
Current CPC
Class: |
D06H 5/00 20130101; D05B
23/00 20130101; D05B 7/00 20130101; E06B 7/22 20130101; F24C 15/021
20130101 |
Class at
Publication: |
49/498.1 ;
112/475.08; 112/2; 28/141 |
International
Class: |
E06B 7/22 20060101
E06B007/22; D05B 23/00 20060101 D05B023/00; D06H 5/00 20060101
D06H005/00; D05B 7/00 20060101 D05B007/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 13, 2012 |
CN |
201220015047.1 |
Oct 19, 2012 |
CN |
201210400658.2 |
Claims
1. A seal strip, comprising a tubular seal strip body with a first
end and a second end, wherein the first end extends into the second
end and is securely connected to the second end by a sewing
thread.
2. A method for sewing the seal strip according to claim 1,
comprising the following steps: (1) inserting and connecting two
ends of the seal strip to form an inserting part; (2) penetrating
the inserting part with the sewing thread along the radial
direction of the seal strip; (3) rotating the inserting part to the
predetermined angle around the axis of the seal strip; (4)
penetrating the inserting part with the sewing thread in the
reverse route against that in step (2); (5) repeating the steps
(2)-(4) until the sewing of the seal strip is completed.
3. A device for sewing the seal strip according to claim 1,
including a rack, wherein the device comprises: a device for
positioning the ends of the seal strip to position the first end
and the second end of the seal strip; and a device for butt joining
the ends of the seal strip, comprising a first fixture and a second
fixture to clamp the first end and the second end of the seal strip
respectively, the first fixture comprises: a limit slot fixed on
the rack; and a clamp cover hinged on the rack and matched with the
limit slot; the second fixture comprises: two parallel limit strips
fixed on the rack; a mobile table arranged on the rack; a lower
chuck fixed on the mobile table, which is an arc supporting spring
positioned between the two limit strips; a swinging arm hinged with
the mobile table; an upper chuck fixed at free end of the swinging
arm, which is rod-shaped, cooperates with the arc supporting spring
to clamp the second end of the seal strip and gets into the first
end of the seal strip along with the mobile table; a device for
sewing the seal strip, comprising a rotary fixture positioned on
the rack to clamp the seal strip; a needle dial mounted on the
rack; a first clamping jaw, which picks sewing needle from the
needle dial in sliding fit with the rack; a second clamping jaw,
which cooperates with the first clamping jaw and pierces the seal
strip with sewing needle by turns in sliding fit with the rack.
4. The device for sewing the seal strip according to claim 3,
wherein it is equipped with a seal strip feeding machine which
provides seal strips to the device for positioning the ends of the
seal strip, comprising: a plurality of multiple parallel arranged
conveying rolls connected on the rack by shaft; a guide plate
obliquely fixed on the rack; a flap plate hinged with the rack,
which is used to move the seal strip on the conveying rolls onto a
top surface of the guide plate; and a seal strip receiving groove
located at bottom edge of the guide plate.
5. The device for sewing the seal strip according to claim 4,
wherein the device for positioning the ends of the seal strip
comprises: a seal strip receiving groove fixed on the rack; two
pressure wheels mounted on the rack and used to clamp and deliver
the seal strip, with opposite delivering directions; a seal strip
holding opening positioned at bottom surface of the seal strip
receiving groove; a three-dimensional mobile platform arranged on
the rack; and a seal strip pickup mechanism fixed on the
three-dimensional mobile platform.
6. The device for sewing the seal strip according to claim 5,
wherein it is equipped with a device for inwardly folding the
second end of the seal strip, comprising: a two-dimensional mobile
platform slidably arranged on the rack; and a pneumatic jaw fixed
on the two-dimensional mobile platform, which is provided with at
least three chucks driving ends of the seal strip to fold
inwardly.
7. The device for sewing the seal strip according to claim 6,
wherein it is equipped with a device for threading a needle for the
device for sewing the seal strip, comprising: a sewing needle
conveying mechanism; a three-dimensional mobile needle clamp to
fetch sewing needle from the sewing needle conveying mechanism; a
supporting jib arm with a threading hole; a lead clamp positioned
under the supporting jib arm to pull sewing thread from the
threading hole; a hooked needle to stretch into the sewing needle
eye to hook the sewing thread; and a pair of thread scissors, which
is mounted on the supporting jib arm to cut the sewing thread.
8. The device for sewing the seal strip according to claim 7,
wherein the sewing needle comprises a needle rod, needle tips at
both ends of the needle rod, and a needle eye in the middle of the
needle rod, wherein the section of the needle rod is rectangle.
9. The device for sewing the seal strip according to claim 8,
wherein the sewing needle conveying mechanism comprises: a needle
bin for holding sewing needles; a needle tray positioned at bottom
of the needle bin and matched with the size of a single sewing
needle; a needle sweeping wheel mounted on the side wall of the
needle bin by a revolving shaft, which is located at a top opening
of the needle tray; a needle pushing plate arranged at a bottom of
the needle tray, which is equipped with a falling needle tray on
the top for receiving the sewing needle from the needle tray; and a
needle pushing cylinder, which drives the needle pushing plate to
move.
10. A method for sewing the seal strip with the device for sewing
the seal strip according to claim 3, wherein the following steps
are comprised: (1) The second fixture clamping the second end of
the seal strip and extending into the first end of the seal strip
to form an inserting part; (2) positioning the inserting part in
the rotary fixture, and the first clamping jaw clamping the sewing
needle and penetrating the inserting part along the radial
direction of the seal strip, while the second clamping jaw clamping
the sewing needle and continues to move away from the rotary
fixture; (3) the rotary fixture rotating around its axis to the
predetermined angle; (4) the second clamping jaw clamping the
sewing needle and penetrating the seal strip in the reverse
direction, while the first clamping jaw clamping the sewing needle
and continuing to move away from the rotary fixture; (5) repeating
steps (2)-(4) until the sewing of the seal strip is completed.
Description
FIELD OF THE TECHNOLOGY
[0001] The present invention relates to a processing equipment and
a processing method of a seal strip, particularly to a seal strip,
a method and a device for sewing the same.
BACKGROUND OF THE TECHNOLOGY
[0002] The doors of electric appliances such as ovens,
refrigerators, microwave ovens and clothing dryers should be
normally closed with tubular seal strips around the peripheries of
the doors, so as to ensure good airtightness.
[0003] Such kind of seal strip is generally comprised of an inner
supporting tube (inner layer) and an outer tube (outer layer),
wherein the inner supporting tube is woven with metal wires and the
outer tube can be woven with insulation/thermal materials like
glass fiber. Such kind of seal strip can still have strong
mechanical strength and good airtightness after long-term use under
high temperature, since the inner supporting tube can provide the
seal strip with strength and the outer insulation/thermal material
makes the seal strip suitable for use under high temperature.
[0004] The door panels of various electric appliances are different
in their specifications, so are the seal strips; when the electric
appliance is cut off, the ends of the seal strips shall be
connected into a ring form. The current method is to connect the
ends with two clips.
[0005] The Chinese utility model Application No.: 200920120533.8
discloses a clip designed for an oven door seal strip, which is
made with one flexible and elastic metal wire or other proper
materials, comprising of a head part matched with the mounting
surface, a neck part and a base. The base is vertical to the head
part and connected at the neck part, being in the coiled spiral
shape on one plane, with a gap between the first terminal of the
metal wire and its adjacent inner metal wire.
[0006] Such means of connection with clips is insufficient in
strength and is undesirable when clips are not required for
mounting a seal strip.
[0007] The utility model Application No.: 201220015047.1 discloses
a seal strip for sealing of an electric appliance door, comprising
a tubular seal strip body with a first end and a second end,
wherein the first end extends into the second end and is securely
connected to the second end by a sewing thread.
[0008] In the present art, the ends of the seal strip are sewed
manually with low efficiency.
SUMMARY OF THE INVENTION
Technical Problems
[0009] The present invention provides a seal strip, a method and a
device for sewing the seal strip, solving the problem of
insufficient strength at joints of the seal strips, accomplishing
complete automation in sewing the seal strip, and thus greatly
improving the efficiency in sewing the seal strip.
Solution to the Problems
[0010] The technical solution is a seal strip comprising a tubular
seal strip body with a first end and a second end, wherein the
first end extends into the second end and is securely connected to
the second end by a sewing thread.
[0011] An outer circumference of the first end fits to an inner
circumference of the second end.
[0012] A part of the second end is inwardly folded to form a
double-deck structure area which is securely connected to the first
end by a sewing thread.
[0013] The outer circumference of the first end is in contact with
an inner circumference of the double-deck structure area.
[0014] The tubular seal strip body is comprised of an inner tubular
metal net and an outer glass fiber casing.
[0015] The present invention also relates to a method for sewing
the seal strip, comprising the following steps: [0016] (1)
inserting and connecting the two ends of the seal strip to form an
inserting part; [0017] (2) penetrating the inserting part with the
sewing thread along the radial direction of the seal strip; [0018]
(3) rotating the inserting part to the predetermined angle around
the axis of the seal strip; [0019] (4) penetrating the inserting
part with the sewing thread in the reverse route against that in
step (2); [0020] (5) repeating steps (2)-(4) until the sewing of
the seal strip is completed.
[0021] The present invention also provides a device for sewing the
seal strip, including a rack, comprising:
[0022] a device for positioning the ends of the seal strip to
position the first end and the second end of the seal strip;
[0023] a device for butt-joining the ends of the seal strip,
comprising a first fixture and a second fixture to clamp the first
end and the second end of the seal strip, respectively.
[0024] The first fixture comprises: [0025] a limit slot fixed on
the rack; [0026] a clamp cover hinged on the rack and matched with
the limit slot;
[0027] The second fixture comprises: [0028] two parallel limit
strips fixed on the rack; [0029] a mobile table arranged on the
rack; [0030] a lower chuck fixed on the mobile table, which is an
arc supporting spring positioned between the two limit strips;
[0031] a swinging arm hinged with the mobile table; [0032] an upper
chuck fixed at free end of the swinging arm, which is rod-shaped,
cooperates with the arc supporting spring to clamp the second end
of the seal strip and gets into the first end of the seal strip
along with the mobile table; [0033] a device for sewing the seal
strip, comprising a rotary fixture positioned on the rack to clamp
the seal strip; [0034] a needle dial mounted on the rack; [0035] a
first clamping jaw, which picks sewing needle from the needle dial
in sliding fit with the rack; [0036] a second clamping jaw, which
cooperates with the first clamping jaw and pierces the seal strip
with sewing needle by turns in sliding fit with the rack.
[0037] After positioning of the ends of the seal strip by the
device for positioning the ends of the seal strip, the first end of
the seal strip is positioned in the limit slot, and the clamp cover
flips and, in cooperation with the limit slot, clamps the first end
of the seal strip. Meanwhile, the second end of the seal strip is
positioned between the two said limit strips, which means, on the
arc supporting spring, and the swinging arm rotates, driving the
upper chuck at free end of the swinging arm, in coordination with
the lower chuck, and clamps the second end of the seal strip. Thus,
the mobile table moves and drives the second end of the seal strip
to get into the first end of the seal strip.
[0038] After butt-joining the ends of the seal strip, the
butt-joining part of the seal strip is positioned in the rotary
fixture, wherein the first clamping jaw picks a sewing needle from
the needle dial, slides and pierces the butt-joining part of the
seal strip with the sewing needle. The second clamping jaw clamps
the sewing needle and threads across one end of the seal strip,
while the first clamping jaw loosens the sewing needle and the
second clamping jaw clamps the sewing needle, slides away from the
seal strip for a certain distance, and immediately returns. When
the rotary fixture rotates to a certain angle, the second clamping
jaw pierces the seal strip with the sewing needle and the first
clamping jaw clamps the other end of the sewing needle, while the
second clamping jaw loosens the sewing needle and the first
clamping jaw clamps the sewing needle, slides away from the seal
strip for a certain distance, and immediately returns. When the
rotary fixture rotates to a certain angle, this process repeats
again and again until sewing of the butt-joining part of the seal
strip is finished.
[0039] The first clamping jaw and the second clamping jaw clamp the
sewing needle in turn, with the position of clamping the sewing
needle getting close to the seal strip in turn. After the last
sewing and tensioning the sewing thread, the sewing needle drops
automatically, and the first clamping jaw, the second clamping jaw
and the rotary fixture reset.
[0040] It is preferred that a seal strip feeding machine which
provides seal strips to the device for positioning the ends of the
seal strip is equipped, comprising: [0041] multiple parallel
arranged conveying rolls connected on the rack by a shaft; [0042] a
guide plate obliquely fixed on the rack; [0043] a flap plate hinged
with the rack, which is used to move the seal strip on the
conveying rolls onto the top surface of the guide plate; and [0044]
a seal strip receiving groove located at a bottom edge of the guide
plate.
[0045] After being cut by the cutting machine, the seal strip is
delivered to a certain position by the parallel arranged conveying
rolls and the flap plate moves the seal strip on the conveying
rolls onto the top surface of the guide plate, and then the seal
strip slides down to the seal strip receiving groove located at
bottom edge of the guide plate along the oblique top surface of the
guide plate.
[0046] Actuating signal of the flap plate may be given out by a
position sensor positioned at one side of the conveying rolls.
After sensing the signal of the seal strip, the position sensor
gives out signal to the flap plate which actuates and throws the
seal strip onto the top surface of the guide plate.
[0047] Actuating signal of the flap plate may also be controlled by
time, with the time interval of actuation of the flap plate being
preset based on the cutting speed of the cutting machine, and the
flap plate will actuate and throw the seal strip onto the top
surface of the guide plate in such time interval.
[0048] It is preferred that the device for positioning the ends of
the seal strip comprises: [0049] a seal strip receiving groove
fixed on the rack; [0050] two pressure wheels mounted on the rack
for clamping and delivering the seal strip, with opposite
delivering directions; [0051] a seal strip holding opening
positioned at the bottom surface of the seal strip receiving
groove; [0052] a three-dimensional mobile platform arranged on the
rack; and [0053] a seal strip pickup mechanism fixed on the
three-dimensional mobile platform. [0054] after being fed by the
feeding machine, the seal strip is located in the seal strip
receiving groove and the two pressure wheels clamp both ends of the
seal strip respectively, transfer in opposite directions and move
the ends of the seal strip to the middle. Due to the action of
gravity, the middle part of the seal strip hangs from the seal
strip holding opening and the two pressure wheels stop rotating
when the ends of the seal strip move the appointed position. Then,
the three-dimensional mobile platform moves to the appropriate
position above the seal strip and the seal strip pickup mechanism
picks up the seal strip.
[0055] It is preferred that a device for inwardly folding the
second end of the seal strip is provided, the device comprising:
[0056] a two-dimensional mobile platform slidably arranged on the
rack; and [0057] a pneumatic jaw fixed on the two-dimensional
mobile platform, comprising of at least three chucks driving ends
of the seal strip to fold inwardly.
[0058] The first end of the seal strip is positioned in the first
fixture, and when the two-dimensional mobile platform slides to an
appropriate position relative to the first fixture, the pneumatic
jaw clamps external of the first end of the seal strip and the
two-dimensional mobile platform slides along direction of the seal
strip, and then, the pneumatic jaw enters into the first end of the
seal strip, and drives the first end of the seal strip to fold
inwardly. After finishing folding inwardly, the two-dimensional
mobile platform moves in reverse direction and the pneumatic jaw
moves out of the first end of the seal strip.
[0059] Since the grip of the pneumatic jaw does not entirely clamp
the end of the seal strip, the inwardly folded flange of the seal
strip does not go out synchronously with the pneumatic jaw.
[0060] It is preferred that a device for threading a needle for the
device for sewing the seal strip is provided, comprising: [0061] a
sewing needle conveying mechanism; [0062] a three-dimensional
mobile needle clamp to fetch the sewing needle from the sewing
needle conveying mechanism; [0063] a supporting jib arm with a
threading hole; [0064] a lead clamp positioned under the supporting
jib arm to pull sewing thread from the threading hole; [0065] a
hooked needle to stretch into the sewing needle eye to hook the
sewing thread; and [0066] a pair of thread scissors, which is
mounted on the supporting jib arm to cut the sewing thread.
[0067] The three-dimensional mobile needle clamp fetches sewing
needle from the sewing needle conveying mechanism and the lead
clamp pulls sewing thread from the threading hole, while the hooked
needle stretches into the sewing needle eye to hook the sewing
thread, the thread scissors cut the sewing thread, and the hooked
needle pulls the sewing thread across the needle eye.
[0068] It is preferred that the sewing needle comprises a needle
rod, needle tips at both ends of the needle rod, and a needle eye
in the middle of the needle rod, wherein the section of the needle
rod is rectangle.
[0069] Both ends of the sewing needle are needle tips. During the
sewing process of the seal strip, the sewing thread passes through
the middle needle eye and both ends of the sewing needle can pierce
the seal strip for sewing operation. During the automatic sewing
process of the seal strip, there is no need to adjust the moving
direction of the sewing needle tip so that the automatic sewing
route is concise and the sewing process is quick, thus improving
the sewing efficiency of the seal strip.
[0070] It is preferred that the sewing needle conveying mechanism
comprises: [0071] a needle bin for holding sewing needles; [0072] a
needle tray positioned at bottom of the needle bin and matched with
the size of a single sewing needle; [0073] a needle sweeping wheel
mounted on the side wall of the needle bin by a revolving shaft,
and located at the top opening of the needle tray; [0074] a needle
pushing plate arranged at bottom of the needle tray, which is
equipped with a falling needle tray on the top for receiving the
sewing needle from the needle tray; and [0075] a needle pushing
cylinder, which drives the needle pushing plate to move.
[0076] The sewing needle is put in the needle bin, and the width of
the needle tray is comparable to the thickness of the sewing needle
(i.e. the width of the rectangular section of the sewing needle).
The needle sweeping wheel keeps rotating, and the sewing needle
falls into the falling needle tray via the needle tray only when
the thickness and the direction of the sewing needle are comparable
to the needle tray, with the depth of the falling needle tray
matching with the width of the sewing needle (i.e. the length of
the rectangular section of the sewing needle) and the width of the
falling needle tray being able to hold only one sewing needle each
time. After the sewing needle is positioned in the falling needle
tray, the needle pushing cylinder pushes the needle pushing plate
to move and drives the sewing needle in the falling needle tray to
move to an appropriate position.
[0077] The needle dial comprises: [0078] a needle dial body and a
needle dial cover; [0079] The needle dial body is in disc-shaped
with several needle holding grooves arranged in radial direction on
a top surface of the needle dial body, and a needle inserting mouth
on each needle holding groove stretching to outer edge of the
needle dial; and [0080] The needle dial cover is positioned on the
top surface of the needle dial body by a connector in coaxial.
[0081] The width of each needle holding groove is comparable to the
thickness of the sewing needle, and the depth of the needle holding
groove is comparable to the width of the sewing needle. Thus, the
sewing needle is inserted into the needle holding groove via the
needle inserting mouth, positioned in the cavity formed by the
needle holding groove and the needle dial cover, and closely fits
with the cavity.
[0082] Since the length of the needle holding groove is less than
that of the sewing needle, after being inserted into the needle
holding groove via the needle inserting mouth, only one part of the
sewing needle is positioned in the needle holding groove, and the
rest part is outside the needle dial body so that the sewing needle
can be easily inserted and taken out. It is preferred that the
length of the needle holding groove is less than a quarter of the
length of the sewing needle.
[0083] The present invention also provides a method for sewing the
seal strip with the device for sewing the seal strip, comprising
the following steps: [0084] (1) the second fixture clamps the
second end of the seal strip and extends into the first end of the
seal strip to form an inserting part; [0085] (2) positioning the
inserting part in the rotary fixture, and the first clamping jaw
clamps the sewing needle and penetrates the inserting part along
the radial direction of the seal strip, while the second clamping
jaw clamps the sewing needle and continues to move away from the
rotary fixture; [0086] (3) the rotary fixture rotates around its
axis to the predetermined angle; [0087] (4) the second clamping jaw
clamps the sewing needle and penetrates the seal strip in the
reverse direction, while the first clamping jaw clamps the sewing
needle and continues to move away from the rotary fixture; and
[0088] (5) repeat steps (2)-(4) until the sewing of the seal strip
is completed.
Beneficial Effects of the Invention
Beneficial Effects:
[0089] The disclosed seal strip, the method and device for sewing
the seal strip can provide a high connection strength and
accomplish complete automation in sewing the seal strip, thus
greatly improving efficiency during the production and processing
of the seal strip.
BRIEF DESCRIPTION OF THE DRAWINGS
[0090] FIG. 1 shows the schematic view of the device for sewing the
seal strip in the present invention;
[0091] FIG. 2 shows the schematic view of the seal strip feeding
machine;
[0092] FIG. 3 shows the schematic view of the structure of the flap
plate of the seal strip feeding machine;
[0093] FIG. 4 shows the schematic view of the device for
positioning the ends of the seal strip;
[0094] FIG. 5 shows the schematic view of the device for
positioning the ends of the seal strip (oblique view);
[0095] FIG. 6 shows the side view of the device for positioning the
ends of the seal strip;
[0096] FIG. 7 shows the schematic view of the three-dimensional
mobile platform;
[0097] FIG. 8 shows the schematic view of the device for inwardly
folding an edge of the seal strip;
[0098] FIG. 9 shows the enlarged view of Part A in FIG. 8;
[0099] FIG. 10 shows the schematic view of the device for inwardly
folding an edge of the seal strip (another viewing angle);
[0100] FIG. 11 shows the schematic view of the device for
butt-joining the ends of the seal strip;
[0101] FIG. 12 shows the side view of the device for butt-joining
the ends of the seal strip;
[0102] FIG. 13 shows the schematic view of the device for
butt-joining the ends of the seal strip (another viewing
angle);
[0103] FIG. 14 shows the enlarged view of Part A in FIG. 13;
[0104] FIG. 15 shows the schematic view of the seal strip
transferring mechanism of the device for butt-joining the ends of
the seal strip;
[0105] FIG. 16 shows the schematic view of the device for sewing
the seal strip;
[0106] FIG. 17 shows the front view of the device for sewing the
seal strip;
[0107] FIG. 18 shows the schematic view of the device for sewing
the seal strip (another viewing angle);
[0108] FIG. 19 shows the schematic view of the rotary fixture of
the device for sewing the seal strip;
[0109] FIG. 20 shows the schematic view of the route of the sewing
needle during the sewing process of the device for sewing the seal
strip;
[0110] FIG. 21 shows the schematic view of the device for threading
a needle for the seal strip;
[0111] FIG. 22 shows the side view of the device for threading a
needle for the seal strip;
[0112] FIG. 23 shows the schematic view of the device for threading
a needle for the seal strip (another viewing angle);
[0113] FIG. 24 shows the schematic view of the thread scissors of
the device for threading a needle for the seal strip;
[0114] FIG. 25 shows the sectional view of the thread scissors of
the device for threading a needle for the seal strip;
[0115] FIG. 26 shows the schematic view of the sewing needle
conveying mechanism;
[0116] FIG. 27 shows the exploded view of the needle dial;
[0117] FIG. 28 shows the schematic view of the sewing needle;
[0118] FIG. 29 shows the longitudinal sectional view of the first
sewing method of the seal strip;
[0119] FIG. 30 shows the schematic cross-sectional view of the
second sewing method of the sewing part of the seal strip;
[0120] FIG. 31 shows the schematic cross-sectional view of the
third sewing method of the sewing part of the seal strip;
EMBODIMENT OF THE INVENTION
[0121] A device for sewing the seal strip in the present invention
will be elaborated in details next in combination with the
drawings.
[0122] As shown in FIG. 29, the disclosed embodiment is a seal
strip, comprising a seal strip body made from an inner tubular
metal net 114 and an outer glass fiber casing 115. The seal strip
body is provided with a first end 116 and a second end 117, wherein
the first end 116 extends into the second end 117, and outer
circumference of the first end 116 fits to inner circumference of
the second end 117, and is securely connected by a sewing thread
113, providing a high connection strength and being suitable for
the assembly of any door panel.
[0123] As shown in FIG. 29, a part of the second end 117 is
inwardly folded to form a double-deck structure area which is
securely connected to the first end 116 by the sewing thread 113,
aiming to prevent the outer glass fiber casing from sleaving and
affecting the appearance and sealing effect. Therefore, the
inwardly folded part can only be the outer glass fiber casing
instead of the tubular metal net.
[0124] The sewing thread 113 winds on the seal strip body for at
least one circle and there are multiple sewing methods. FIG. 30
shows the second sewing method and FIG. 31 shows the third sewing
method.
[0125] The disclosed is also a method for sewing the seal strip,
comprising the following steps: [0126] (1) inserting and connecting
two ends of the seal strip to form an inserting part; [0127] (2)
penetrating the inserting part with sewing thread along the radial
direction of the seal strip; [0128] (3) rotating the inserting part
to the predetermined angle around the axis of the seal strip;
[0129] (4) penetrating the inserting part with the sewing thread in
the reverse route against that in step (2); and [0130] (5)
repeating steps (2)-(4) until the sewing of the seal strip is
completed.
[0131] As shown in FIG. 1, the disclosed embodiment is a device for
sewing the seal strip, comprising a seal strip feeding machine 1, a
device 2 for positioning the ends of the seal strip, an equipment
for inwardly folding an edge of the seal strip, a device 3 for
butt-joining the ends of the seal strip, a device 5 for threading a
needle for the seal strip, and a device 4 for sewing the seal
strip.
[0132] As shown in FIG. 2, the seal strip feeding machine comprises
a rack, multiple parallel arranged conveying rolls 106 connected on
the rack by a shaft, a guide plate 104 fixed on the rack, a flap
plate hinged with the rack, which is used to move the seal strip on
the conveying rolls 106 onto the top surface of the guide plate
104, and a seal strip receiving groove 103 located at bottom edge
of the guide plate 104.
[0133] Wherein, as shown in FIG. 3, the flap plate comprises a
supporting part 108 hinged with the rack, a poking part which is
positioned at one side of the supporting part 108 and extends
between two adjacent conveying rolls 106, a transmitting part 101
positioned at the other side of the supporting part 108, and a flap
plate cylinder 107 arranged on the rack with a piston rod of the
flap plate cylinder 107 being connected with the transmitting part
101.
[0134] The poking part involves at least four driving levers 102
connected with one side of the supporting part 108, with each
driving lever 102 extending between two corresponding adjacent
conveying rolls 106 and the top surface of the driving lever 102
being lower than the top surface of the conveying rolls 106. All
the driving levers 102 keep away from one side of the supporting
part 108, and are interconnected via the interconnecting piece 105
which is vertical to the driving lever 102 and stops the seal strip
from sliding from the driving lever 102 when the seal strip is
thrown. The supporting part 108, the transmitting part 101 and the
poking part may be respectively made and assembled, or be made as
an integral structure.
[0135] The guide plate 104 is obliquely arranged with an included
angle of 45-70.degree. with the horizontal plane, so that the seal
strip can slide down into the seal strip receiving groove 103 along
the top surface of the guide plate 104 due to the action of gravity
after being thrown by the flap plate onto the top surface of the
guide plate 104.
[0136] The seal strip receiving groove 103 is U-shaped and matches
with the seal strip so that the seal strip is distributed at the
bottom of the U-shaped groove in straight line, which is convenient
for the subsequent positioning of the ends of the seal strip.
[0137] In an embodiment, actuating signal of the flap plate may be
given out by a position sensor positioned at one side of the
conveying rolls 106. After sensing the signal of the seal strip,
the position sensor gives out signal to the flap plate which
actuates and throws the seal strip onto the top surface of the
guide plate 104.
[0138] In another embodiment, the actuating signal of the flap
plate may also be controlled by time, with the time interval of
actuation of the flap plate preset based on the cutting speed of
the cutting machine, and the flap plate will actuate and throw the
seal strip onto the top surface of the guide plate 104 in such time
interval.
[0139] As shown in FIG. 4, FIG. 5 and FIG. 6, the device for
positioning the ends of the seal strip comprises a seal strip
receiving groove 103 fixed on the rack, two pressure wheels mounted
on the rack and used to clamp and deliver the seal strip 110, a
seal strip holding opening 109 positioned at the bottom surface of
the seal strip receiving groove 103, a three-dimensional mobile
platform 302 arranged on the rack, and a seal strip pickup
mechanism fixed on the three-dimensional mobile platform 302.
[0140] The seal strip holding opening 109 is a strip-type notch
arranged along length direction of the seal strip receiving groove
103, with the two pressure wheels positioned at each side of the
length direction of the strip-type notch, respectively.
[0141] With two pressure wheels positioned at each side of the
length direction of the strip-type notch respectively, after being
clamped by the two pressure wheels respectively, both ends of the
seal strip 110 start relative movement by transmission of the two
pressure wheels and the middle part of the seal strip 110 hangs
from the strip-type notch due to squeezing and gravity.
[0142] The two pressure wheels, i.e. the first pressure wheel and
the second pressure wheel, respectively, comprise a lower pressure
wheel 202 connected at the bottom surface of the seal strip
receiving groove 103, a sliding seat 207 assorted with the rack, a
lifting wheel seat 205 mounted on the sliding seat 207, and an
upper pressure wheel 203 connected with the lifting wheel seat 205
by shaft, which matches with the lower pressure wheel 202.
[0143] The upper pressure wheel 203 and the lower pressure wheel
202 are positioned up and down the seal strip receiving groove 103,
respectively, and there is an avoidance opening corresponding to
the position of the lower pressure wheel 202 at the bottom surface
of the seal strip receiving groove 103. At least part of outer
circumference of the lower pressure wheel 202 extends above the
bottom surface of the seal strip receiving groove 103 via the avoid
opening, keeps direct contact with the seal strip 110, clamps the
seal strip 110 together with the upper pressure wheel 203, and
drives ends of the seal strip 110 to move to the appointed position
due to the force of friction between the upper pressure wheel 203
and the seal strip 110, as well as that between the lower pressure
wheel 202 and the seal strip 110.
[0144] A position sensor 201 sensing ends of the seal strip 110 is
arranged at both sides along the length direction of the strip-type
notch. The lower pressure wheel 202 is a driving wheel connected
with a driving mechanism 204, for which the control signal is given
by the position sensor 201.
[0145] As shown in FIG. 7, the seal strip pickup mechanism
comprises: [0146] a supporting beam 301 fixed on the
three-dimensional mobile platform 302; [0147] a first mechanical
arm 3031 and a second mechanical arm 3032 that are slidably mounted
on the supporting beam 301; [0148] a first rotary table 3041 and a
second rotary table 3042 positioned on the first mechanical arm
3031 and the second mechanical arm 3032, respectively; [0149] a
first pickup needle 3051 and a second pickup needle 3052 fixed on
the bottom surface of the first rotary table 3041 and the second
rotary table 3042, respectively.
[0150] The first pickup needle 3051 and the second pickup needle
3052 comprise two needles respectively so that the seal strip 110
can be kept in a fixed shape during moving instead of rotating
around the pickup needle. Meanwhile, it can appropriately increase
the friction between the pickup needle and the seal strip 110 so
that the seal strip 110 will not fall off the pickup needle easily
during the process of moving.
[0151] A pinhole 206 is positioned at the bottom surface of the
seal strip receiving groove 103 to avoid the first pickup needle
3051 and the second pickup needle 3052.
[0152] As shown in FIG. 8, FIG. 9 and FIG. 11, the device for
inwardly folding an edge of the seal strip comprises a first
fixture fixed on the rack to clamp the ends of the seal strip, a
two-dimensional mobile platform slidably arranged on the rack, and
a pneumatic jaw 404 fixed on the two-dimensional mobile platform
which is provided with three chucks 405 driving ends of the seal
strip to fold inwardly.
[0153] The chuck 405 is strip-shaped and its contact surface with
the seal strip is a sunken cambered surface.
[0154] The two-dimensional mobile platform comprises a guide rod
403, a first sliding table 407 moving along the guide rod 403, a
translation cylinder mounted on the first sliding table 407, and a
second sliding table 406 fixed with the piston rod of the
translation cylinder.
[0155] Moving direction of the piston rod of the translation
cylinder is vertical to the guide rod 403, and the pneumatic jaw
404 is mounted on the second sliding table 406.
[0156] The guide rod 403 comprises two rods arranged in parallel
and there are two sliding sleeves 408 matching with the two guide
rods 403 respectively on the bottom surface of the first sliding
table 407. There is also a thrust cylinder 410 on the rack to drive
the first sliding table 407, with the piston rod of the thrust
cylinder 410 connected with the bottom of the first sliding table
407 at the part between the two sliding sleeves 408.
[0157] The second sliding table 406 comprises a horizontal base
fixed with the piston rod of the translation cylinder and a
vertical support plate 409 perpendicularly fixed on the horizontal
base, with the pneumatic jaw 404 mounted on the vertical support
plate 409.
[0158] As shown in FIG. 11, FIG. 12 and FIG. 13, the device for
butt-joining the ends of the seal strip comprises a first fixture
and a second fixture to clamp the first end and the second end of
the seal strip respectively, wherein the first fixture comprises a
limit slot 402 fixed on the rack and a clamp cover 401 hinged on
the rack and matched with the limit slot 402; and the second
fixture comprises two parallel limit strips 501 fixed on the rack,
a mobile table 506 arranged on the rack, a lower chuck 510 fixed on
the mobile table 506, a swinging arm 502 hinged with the mobile
table 506 and an upper chuck 503 fixed at the free end of the
swinging arm 502.
[0159] As shown in FIG. 13 and FIG. 14, the lower chuck 510 is an
arc supporting spring positioned between the two limit strips 501,
and the upper chuck 503 is rod-shaped, cooperates with the arc
supporting spring to clamp the second end of the seal strip and
gets into the first end of the seal strip along with the mobile
table 506.
[0160] The middle part of the swinging arm 502 is hinged with the
mobile table 506 by a revolving shaft, with one end being the free
end mounted with the upper chuck 503 and the other end being the
driving end. There is also an oscillating cylinder 504 on the
mobile table 506, with the piston rod of the oscillating cylinder
504 connected and cooperated with the driving end of the swinging
arm 502. There is a reset spring 512 connecting the mobile table
506 and the swinging arm 502.
[0161] The piston rod of the oscillating cylinder 504 pushes the
driving end of the swinging arm 502 to move around the revolving
shaft, with the free end of the swinging arm 502 moving
correspondingly, which drives the upper chuck 503 on the free end
of the swinging arm 502 to move and cooperate with the lower chuck
510 to clamp the second end of the seal strip.
[0162] A push plate 507 is fixed on the piston rod of the
oscillating cylinder 504 and a fixed pulley 513 is arranged at the
driving end of the swinging arm 502, with the push plate 507 being
in contact with the outer circumference of the fixed pulley
513.
[0163] There is a lifting locating pin 508 at an opening of the
limit slot 402 facing the second fixture, and there is a strip-type
avoidance opening 511 on the arc supporting spring matching with
the lifting locating pin 508, which is arranged along moving
direction of the mobile table 506.
[0164] As shown in FIG. 15, the device for butt-joining the ends of
the seal strip also comprises a seal strip transferring mechanism
which includes a three-dimensional moving arm 515 and a seal strip
transfer needle 516 mounted on the three-dimensional moving arm
515.
[0165] There is an avoidance hole 509 matching with the seal strip
transfer needle 516 on the bottom surface of the limit slot 402,
and there is an avoid hole 505 matching with the seal strip
transfer needle 516 on the clamp cover 401 so that the seal strip
transfer needle 516 can pass through the seal strip.
[0166] As shown in FIG. 16, FIG. 17 and FIG. 18, the device for
sewing the seal strip comprises a rotary fixture positioned on the
rack to clamp the seal strip, a needle dial 607 mounted on the
rack, a first clamping jaw 602 which picks sewing needle 608 from
the needle dial 607 in sliding fit with the rack, and a second
clamping jaw 601 which cooperates with the first clamping jaw 602
and pierces the seal strip with sewing needle 608 by turns in
sliding fit with the rack.
[0167] The first clamping jaw 602 and the second clamping jaw 601
are positioned at each side of the rotary fixture and their moving
paths are on the same straight line.
[0168] As shown in FIG. 19, the rotary fixture comprises a
horizontally arranged main shaft 612 which is mounted on the rack
via a support, an electric motor 605 fixed on the rack and used to
drive the main shaft 612, a lower clamp plate 604 fixed with the
main shaft 612, an upper clamp plate 603 hinged with the lower
clamp plate 604, and a driving cylinder 606 used to drive the upper
clamp plate 603 to flip relative to the lower clamp plate 604.
[0169] The upper clamp plate 603 and the lower clamp plate 604 are
in matching semicircular cylinder shape and they can form a
cylinder shape assorted with the seal strip after being merged, so
that the seal strip is not liable to position shift during the
process of sewing.
[0170] A sewing hole 610 for the sewing needle 608 is arranged on
the upper clamp plate 603 and the lower clamp plate 604 so as to
avoid the sewing needle 608.
[0171] An escape groove 615 is located at the joint part of the
lower clamp plate 604 and the main shaft 612, to avoid the seal
strip.
[0172] As shown in FIG. 27, a needle dial 607 is also arranged on
the rack for placing sewing needles 608 after threading, comprising
a needle dial body 905 and a needle dial cover 903, wherein the
needle dial body 905 is disc-shaped with several needle holding
grooves 904 arranged in radial direction on the top surface of the
needle dial body 905, and a needle inserting mouth 906 on each
needle holding groove 904 stretching to outer edge of the needle
dial; and the needle dial cover 903 is positioned on the top
surface of the needle dial body 905 by connector in coaxial.
[0173] The width of each needle holding groove 904 matches with the
thickness of the sewing needle, and the depth of the needle holding
groove 904 matches with the width of the sewing needle. There are a
total of 8 needle holding grooves 904 which are distributed evenly
around the axis of the needle dial body 905.
[0174] The needle inserting mouth 906 is a tapered flaring, and the
edge of the needle dial cover 903 facing the needle dial body 905
is in chamfering or fillet structure.
[0175] The connector is a fastening bolt 901 through the axis of
the needle dial cover 903 and the needle dial body 905, which is
used to fix the needle dial cover 903 and the needle dial body 905
with a pre-loaded spring 902 on the fastening bolt 901.
[0176] The sewing needle 608 inserts into the needle holding groove
via the needle inserting mouth 906 and the needle dial 607 rotates
via the vertical revolving shaft, and rotates the needle holding
groove with the sewing needle 608 to the appropriate position so
that the first clamping jaw 602 can picks up the sewing needle 608
from the needle dial 607.
[0177] A needle passing hole 611 is arranged on the lower clamp
plate 604 for passing of the seal strip transfer needle 516 and a
needle avoiding tray 609 is positioned on the upper clamp plate 603
to avoid the seal strip transfer needle 516.
[0178] During the process of sewing, moving route of the sewing
needle is as shown in FIG. 23, wherein 1s stands for the first
needle and 2s signifies the second needle and so on, with arc
arrows representing the direction of rotation of the rotary
fixture.
[0179] As shown in FIG. 28, the sewing needle 608 for sewing the
ends of the seal strip comprises a needle rod, needle tips at both
ends of the needle rod, and a needle eye in the middle of the
needle rod, wherein the length of the needle rod is 120 mm and
section of the needle rod is rectangle with a long edge of 2.0 mm
and a short edge of 1.0 mm, which could match with the conveying
mechanism of the sewing needle 608. The opening of the needle eye
is flaring.
[0180] As shown in FIG. 21, FIG. 22 and FIG. 23, the device for
threading a needle for the seal strip comprises a sewing needle
conveying mechanism, a three-dimensional mobile needle clamp 704 to
fetch sewing needle 608 from the sewing needle conveying mechanism,
a supporting jib arm 702 with a threading hole 701, a lead clamp
705 positioned under the supporting jib arm 702 to pull sewing
thread from the threading hole 701, a hooked needle 707 to stretch
into the sewing needle 608 eye to hook the sewing thread, and a
pair of thread scissors 703, which is mounted on the supporting jib
arm 702 to cut the sewing thread.
[0181] As shown in FIG. 26, the sewing needle conveying mechanism
comprises a needle bin 801 for holding sewing needles, a needle
tray 805 positioned at bottom of the needle bin 801 and matched
with the size of a single sewing needle, a needle sweeping wheel
802 mounted on the side wall of the needle bin 801 by a revolving
shaft, a needle pushing plate 803 arranged at the bottom of the
needle tray 805, and a needle pushing cylinder 804, which drives
the needle pushing plate 803 to move.
[0182] The needle sweeping wheel 802 is located at the top opening
of the needle tray 805 and the width of the needle tray 805 is
comparable to the thickness of the sewing needle (i.e. the width of
the rectangular section of the sewing needle). Besides, there is a
falling needle tray 806 on the top surface of the needle pushing
plate 803 for receiving the sewing needle from the needle tray
805.
[0183] The needle bin 801 is an inverted cone with a top opening,
and one side wall of the needle bin 801 is arranged vertically with
the other side wall arranged obliquely and the needle sweeping
wheel 802 is positioned on the vertically arranged side wall.
[0184] The obliquely arranged side wall has an included angle of
30-75.degree. with the horizontal plane. The needle tray 805 is a
strip-type tray and axis of the needle sweeping wheel 802 is
parallel to the length direction of the needle tray 805. The
strip-type needle tray 805 fits with the sewing needle in shape,
which makes for adjustment of the sewing needle to match with
position of the needle tray 805.
[0185] The sewing needle 608 is put in the needle bin 801, and the
width of the needle tray is comparable to the thickness of the
sewing needle 608. The needle sweeping wheel 802 keeps rotating,
and the sewing needle 608 falls into the falling needle tray 806
via the needle tray only when the thickness and the direction of
the sewing needle 608 exactly match with the needle tray, with the
depth of the falling needle tray 806 matching with the width of the
sewing needle 608 (i.e. the length of the rectangular section of
the sewing needle) and the width of the falling needle tray 806
being able to hold only one sewing needle 608 each time. After the
sewing needle 608 is positioned in the falling needle tray 806, the
needle pushing cylinder 804 pushes the needle pushing plate 803 to
move and drives the sewing needle 608 in the falling needle tray
806 to move to an appropriate position.
[0186] A lead clamp stand is arranged on the rack which is equipped
with a slidably lifting base 713 and the lead clamp 705 is mounted
on the lifting base 713.
[0187] A hooked needle stand 708 is slidably arranged on the rack
and the hooked needle 707 is mounted on the hooked needle stand
708.
[0188] A telescopic cylinder 714 is positioned on the rack, and a
thread pushing fork 706 is arranged at the end of the piston rod of
the telescopic cylinder 714 to push the sewing thread in place on
the hooked needle stand 707.
[0189] A slidable thread scissors base is arranged on the
supporting jib arm 702 and the thread scissors 703 are mounted on
the thread scissors base.
[0190] As shown in FIG. 24 and FIG. 25, the thread scissors 703
comprise a thread scissors cylinder fixed on the thread scissors
base, a first clamp splice 7101 and a second clamp splice 7102
driven by the thread scissors cylinder, and a first blade 7091 and
a second blade 7092 respectively fixed on the first clamp splice
7101 and the second clamp splice 7102.
[0191] A first clamping piece 7111 and a second clamping piece 7112
are respectively positioned at the opposite side of the first clamp
splice 7101 and the second clamp splice 7102, and they are
respectively connected with the first clamp splice 7101 and the
second clamp splice 7102 via a first spring 7121 and a second
spring 7122.
[0192] The interval between the first clamping piece 7111 and the
second clamping piece 7112 is shorter than the interval between the
first blade 7091 and the second blade 7092. Thus, when the thread
scissors cylinder drives the first clamp splice 7101 and the second
clamp splice 7102 to move face to face, the first clamping piece
7111 and the second clamping piece 7112 are in contact first to
clamp the sewing thread. The thread scissors cylinder continues to
drive the first clamp splice 7101 and the second clamp splice 7102
to move face to face, and the first blade 7091 and the second blade
7092 fixed on the first clamp splice 7101 and the second clamp
splice 7102 are in contact and cut the sewing thread.
[0193] When threading a needle, the three-dimensional mobile needle
clamp 704 fetches the sewing needle 608 from the sewing needle
conveying mechanism and moves to the appropriate position, while
the thread scissors base slides and drives the thread scissors 703
to slide, pull the sewing thread away from the threading hole 701.
The lifting base slides upwards along the stand of the lead clamp
705 to above the thread scissors 703 and stops, while the thread
scissors base resets under the threading hole 701. The lead clamp
705 clamps the sewing thread, the thread scissors 703 loosens the
sewing thread and slides away from the threading hole 701 (to avoid
the lead clamp 705), and the lifting base slides downwards along
the stand of the lead clamp 705. The lead clamp 705 clamps the
sewing thread and moves downwards to the appropriate position, the
hooked needle stand 708 slides upwards along the rack to
corresponding height of the sewing needle 608, with the eye of the
hooked needle 707 aligned with the eye of the sewing needle 608,
and the hooked needle stand 708 slides horizontally and drives the
hooked needle 707 to pass through the eye of the sewing needle 608.
Then, the telescopic cylinder on the rack drives the thread pushing
fork 706 to move, pushes the sewing thread into the hooked needle
707, and the thread pushing fork 706 resets. The hooked needle
stand 708 slides in reverse direction, pulls the sewing thread
through the eye of the sewing needle 608, and the thread scissors
cylinder drives the first clamp splice 7101 and the second clamp
splice 7102 to move face to face, the first clamping piece 7111 and
the second clamping piece 7112 clamp the sewing thread. Then, the
thread scissors cylinder keeps carrying forward, and the first
blade 7091 and the second blade 7092 fixed on the first clamp
splice 7101 and the second clamp splice 7102 are in contact and cut
the sewing thread. The hooked needle stand 708 slides downwards
along the rack and drives one end of the cut sewing thread through
the needle eye, and thus the sewing needle 608 finishing the
threading. Then, the three-dimensional mobile needle clamp 704
finishes the alignment of the sewing needle 608 with the flaring of
the needle inserting mouth 906, slides into the needle holding
groove 904 along the flaring, and the needle dial cover 903 and the
needle dial body 905 automatically clamp the sewing needle 608
under the action of the fastening bolt 901. The three-dimensional
mobile needle clamp 704 loosens the sewing needle, the needle dial
rotates to a fixed angle, and the first clamping jaw 602 grabs the
part of the sewing needle 608 exposed outside the needle dial and
takes it out.
[0194] The present invention also discloses a method for sewing the
seal strip with the device for sewing the seal strip, comprising
the following steps:
[0195] (1) the second fixture clamps the second end of the seal
strip and extends into the first end of the seal strip to form an
inserting part;
[0196] (2) positioning the inserting part in the rotary fixture,
and the first clamping jaw clamps the sewing needle and penetrates
the inserting part along the radial direction of the seal strip,
while the second clamping jaw clamps the sewing needle and
continues to move away from the rotary fixture;
[0197] (3) the rotary fixture rotates around its axis to the
predetermined angle;
[0198] (4) the second clamping jaw clamps the sewing needle and
penetrates the seal strip in the reverse direction, while the first
clamping jaw clamps the sewing needle and continues to move away
from the rotary fixture;
[0199] (5) repeating steps (2)-(4) until the sewing of the seal
strip is completed.
[0200] The seal strip shall rotate 360.degree. to finish the
sewing, and the inserting depth and predetermined angle can be
selected as required.
[0201] During operation of the device for sewing the seal strip,
the seal strip is cut by the cutting machine, and moves along the
conveying rolls 106 to the poking part which is positioned at one
side of the supporting part 108 and extends between two adjacent
conveying rolls 106. The piston rod of the flap plate cylinder 107
withdraws and drives the transmitting part 101 at the other side of
the supporting part 108 to go down, while the poking part
positioned at the other side of the supporting part 108 rises,
throws the seal strip on the poking part onto the top surface of
the guide plate 104, and the seal strip slides down into the seal
strip receiving groove 103 at bottom edge of the guide plate 104
along the oblique top surface of the guide plate 104;
[0202] The seal strip in the seal strip receiving groove 103 is in
contact with the lower pressure wheel 202 while the position sensor
201 senses the signal of the seal strip 110. After the sliding seat
207 assorted with the rack slides to the appropriate position, the
lifting wheel seat 205 fixed on the sliding seat 207 goes down,
with the upper pressure wheel 203 connected with the lifting wheel
seat 205 by shaft going down correspondingly, which makes the
position of the upper pressure wheel 203 matching that of the lower
pressure wheel 202, so that they clamp the seal strip 110 in
cooperation. The driving mechanism 204 drives the lower pressure
wheel 202 to rotate in opposite direction and drives the upper
pressure wheel 203 to rotate, which makes the seal strip 110 move
face to face under clamping and transmission of the first pressure
wheel and the second pressure wheel. Both ends of the seal strip
110 get close to the middle and the middle part of the seal strip
110 hangs down from the seal strip holding opening 109 due to the
action of gravity until the position sensor 201 cannot sense signal
of the seal strip 110 anymore (i.e. ends of the seal strip 110 have
arrived at the appointed position). The position sensor 201 gives
control signal to the driving mechanism 204 of the lower pressure
wheel 202 to stop rotation of the lower pressure wheel 202, and the
upper pressure wheel 203 stops rotating meanwhile with both ends of
the seal strip 110 stopping moving. After the three-dimensional
mobile platform 302 moves to the appropriate position above the
seal strip 110, the supporting beam 301 goes down with the first
pickup needle 3051 and the second pickup needle 3052 respectively
piercing each end of the seal strip 110, and the lifting wheel seat
205 rises and the upper pressure wheel 203 on the lifting wheel
seat 205 rises correspondingly. The sliding seat 207 drives the
lifting wheel seat 205 away from the seal strip receiving groove
103 and the supporting beam 301 rises. After the first mechanical
arm 3031 and the second mechanical arm 3032 slides face to face
with a distance being less than the length of the strip-type notch,
they stop sliding while the first rotary table 3041 and the second
rotary table 3042 rotate for 180.degree., being corresponding to
the ends of the seal strip 110, and thus positioning of the ends of
the seal strip 110 being finished.
[0203] The three-dimensional mobile platform 302 moves above the
device for positioning the ends of the seal strip and the
supporting beam 301 goes down. The first end of the seal strip is
positioned in the limit slot 402, and the clamp cover 401 flips
and, in cooperation with the limit slot 402, clamps the first end
of the seal strip. Meanwhile, the second end of the seal strip is
positioned between the two limit strips 501, which means, on the
arc supporting spring, and the swinging arm 502 rotates, driving
the upper chuck 503 at free end of the swinging arm 502, in
coordination with the lower chuck 510, and clamps the second end of
the seal strip.
[0204] The first sliding table 407 moves towards the ends of the
seal strip in the limit slot 402 along the guide rod 403 to the
appropriate position, and the translation cylinder drives the
second sliding table 406 to move, while the pneumatic jaw 404 fixed
on the second sliding table 406 moves to the position corresponding
to ends of the seal strip. Then, a chuck 405 of the pneumatic jaw
404 clamps ends of the seal strip, and the first sliding table 407
continues sliding along the guide rod 403, drives the chuck 405
clamping the ends of the seal strip extend into interior of the
seal strip, and thus outer layer of the seal strip being
introverted inside. After inwardly folding an edge of the seal
strip, the first sliding table 407 slides along the guide rod 403
in reverse direction and the pneumatic jaw 404 moves out of the
ends of the seal strip, while the translation cylinder drives the
second sliding table 406 to reset and wait for the next cycle.
[0205] The mobile table 506 moves, driving the second end of the
seal strip into the first end of the seal strip to form an
inserting part, and the lifting locating pin 508 rises, passes
through the strip-type avoid opening 511 on the arc supporting
spring, pierces the seal strip and fixes the inserting part of the
first end and the second end of the seal strip. The oscillating
cylinder 504 resets and the swinging arm 502 resets under the
action of the reset spring 512, while the mobile table 506 moves,
driving the upper chuck 503 and the lower chuck 510 withdraw from
the seal strip. After the upper chuck 503 and the lower chuck 510
completely withdraw from the seal strip, the upper chuck 503 resets
under the action of the reset spring 512, and the three-dimensional
moving arm 515 moves to the appropriate position above the seal
strip and lowers. The seal strip transfer needle 516 mounted on the
three-dimensional moving arm 515 pierces the inserting part of the
first end and the second end of the seal strip and the clamp cover
401 flips and opens, while the three-dimensional moving arm 515
rises and the seal strip transfer needle 516 drives the seal strip
to transfer to the device for sewing the seal strip;
[0206] The three-dimensional moving arm 515 transfers the inserting
part of the seal strip to the lower clamp plate 604 and the seal
strip transfer needle 516 passes through the needle passing hole
611 on the lower clamp plate 604, while the driving cylinder 606
drives the upper clamp plate 603 to flip relative to the lower
clamp plate 604 and clamp the butt-joining part of the seal strip
together with the upper clamp plate 603. The first clamping jaw 602
picks a sewing needle 608 from the needle dial 607, slides and
pierces the butt-joining part of the seal strip with the sewing
needle 608. The second clamping jaw 601 clamps the sewing needle
608 and threads across one end of the seal strip, while the first
clamping jaw 602 loosens the sewing needle 608 and the second
clamping jaw 601 clamps the sewing needle 608, slides away from the
seal strip for a certain distance, and immediately returns.
Meanwhile, the main shaft 612 is driven by the electric motor 605
to rotate and drives the rotary fixture to rotate for a fixed
angle, then, the second clamping jaw 601 pierces the inserting part
of the seal strip with the sewing needle 608 and the first clamping
jaw 602 clamps the other end of the sewing needle 608, while the
second clamping jaw 601 loosens the sewing needle 608 and the first
clamping jaw 602 clamps the sewing needle 608, slides away from the
seal strip for a certain distance, and immediately returns when the
rotary fixture rotates to a certain angle. This process repeats
again and again until sewing of the butt-joining part of the seal
strip is finished. After the last sewing, the first clamping jaw
602 clamps the sewing needle 608, tensions the sewing thread, and
the sewing needle 608 drops automatically, with the first clamping
jaw 602, the second clamping jaw 601 and the rotary fixture being
reset.
* * * * *